If someone falls off the ladder and gets seriously hurt, you’d better leave him _____ he falls and try to get help.
----- It’s too strange that these people should laugh when their relatives die. ----- That is the local custom ______ the seventeenth century.
I lent him ten magazines, ____ are more wonderful than you can imagine.
It is silly of me _____ all eggs in one basket. That is the worst mistake I have made.
_________ to give up smoking, he threw away his _______ cigarettes.
Nowadays, ______ number of people doing fitness training is on _______ increase.